KR102686111B1 - absorbent article - Google Patents

Abstract

The absorbent article 1 has longitudinal directions (L), width directions (W), and thickness directions (T) that are orthogonal to each other, an absorbent body 1, and a surface sheet 20 disposed on the skin surface side of the absorbent body. . The top sheet has an extension portion 22 extending outward from the outer edge of the absorber. The extension portion has a diffusion suppression portion (25). The surface sheet is woven or knitted.

Description

absorbent article

The present invention relates to absorbent articles such as sanitary napkins.

Patent Document 1 discloses an absorbent article including an absorber and a top sheet disposed on the skin surface side of the absorber and made of non-woven fabric. Since the nonwoven fabric has liquid permeability, the wearer's body fluids pass through the surface sheet and are absorbed into the absorbent body.

Patent Document 1: Japanese Patent Publication No. 2013-85831

To prevent the absorber from coming out, a seal portion is formed by heat-sealing the extended portion of the top sheet and the extended portion of the back sheet extending outward from the outer edge of the absorber by embossing. Since the sealed portion is compressed in the thickness direction by embossing, the density is greater than the surrounding seal portion. For this reason, body fluids spread from areas of low density toward areas of high density by capillary action. Since the extended portion of the surface sheet does not overlap the absorbent body, it is difficult for body fluid to be absorbed by the absorbent body in the extended portion. Therefore, body fluids diffused from the extension portion of the top sheet are likely to come into contact with the skin, which may cause the wearer to feel uncomfortable.

Accordingly, there is a need for an absorbent article that can suppress the spread of body fluids in the extended portion of the surface sheet extending outward from the outer edge of the absorbent body.

An absorbent article according to one aspect is an absorbent article having longitudinal, width, and thickness directions orthogonal to each other, an absorbent body, and a surface sheet disposed on a skin surface side of the absorbent body, wherein the surface sheet is an outer edge of the absorbent body. It has an extension extending more outwardly, the extension having a diffusion inhibiting portion, and the top sheet is a woven or knitted fabric.

1 is a plan view of the absorbent article according to the embodiment as seen from the skin surface side.
FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 1.
Fig. 3 is a schematic diagram (cross-sectional view) for explaining the diffusion suppression portion according to the first embodiment.
Fig. 4 is a schematic diagram (top view) for explaining the diffusion suppression unit according to the first embodiment.
Fig. 5 is a schematic diagram (cross-sectional view) for explaining the diffusion suppression portion according to the second embodiment.

(1) Overview of embodiment

At least the following matters will become clear from the description of this specification and the accompanying drawings.

An absorbent article according to one aspect is an absorbent article having longitudinal, width, and thickness directions orthogonal to each other, an absorbent body, and a surface sheet disposed on a skin surface side of the absorbent body, wherein the surface sheet is an outer edge of the absorbent body. It has an extension extending more outwardly, the extension having a diffusion inhibiting portion, and the top sheet is a woven or knitted fabric.

When processing the extension of the surface sheet to form the diffusion suppression portion, a force is applied to the processing location of the extension portion (diffusion suppression portion). This increases the density of the processing location and its surroundings.

In the absorbent article herein, the top sheet is made of yarn because the top sheet is a woven or knitted fabric. The threads in and around the processed portion and the threads in the other unprocessed portion of the top sheet (for example, the portion disposed on the skin surface side of the absorber) are continuously connected.

For this reason, even if the threads in and around the processed area are temporarily pulled to the processed area due to the force when processing the extension portion, the threads in and around the processed area are pulled back from the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated at the processing point and its surroundings during processing, the concentration of the fibers is alleviated after processing. On the other hand, when the top sheet is a non-woven fabric, the arrangement direction of the fibers constituting the non-woven fabric is non-uniform, so the fibers in and around the processed portion are not connected to the fibers in the unprocessed portion. Additionally, when force is applied during processing, the fibers in and around the processed area become strongly entangled with each other, making it difficult for the fibers in and around the processed area to be pulled back from the unprocessed portion. Therefore, at the processing site and its surroundings, the fibers remain concentrated even after processing.

As described above, in the absorbent article of the present application, the concentration of fibers in and around the processing area (diffusion suppressing portion) is reduced after processing, and thus the density in the diffusion suppressing portion and its surroundings is lowered compared to a nonwoven fabric top sheet. For this reason, the difference between the density of the diffusion suppressing portion and its surroundings and the density of the unprocessed portion becomes small, so diffusion of body fluids (diffusion of body fluids due to differences in density) from a place of low density to a place of high density due to capillary action can be suppressed. .

According to one preferred aspect, the extension portion may have a diffusion suppression region in which a plurality of diffusion suppression portions are arranged at intervals. The gap may be 3 mm or less.

In the diffusion suppression area, since the diffusion suppression units are arranged at close intervals, diffusion of body fluid can be suppressed in the diffusion suppression area by at least one of the plurality of diffusion suppression units, thereby preventing the body fluid from spreading over a wide area.

According to a preferred embodiment, the plurality of diffusion suppressors include a plurality of first diffusion suppressors arranged at intervals in the array direction, and second diffusion suppressors disposed at positions offset in an orthogonal direction perpendicular to the array direction. It's also good. From a viewpoint along the orthogonal direction, the second diffusion suppressing portion may be disposed between the plurality of first diffusion suppressing portions.

Since the second diffusion suppressor is located in the diffusion direction (i.e., perpendicular to the direction) of the body fluid that spreads through the first diffusion suppressor, diffusion of body fluid is suppressed.

According to one preferred aspect, the distance between the plurality of first diffusion suppressors and the second diffusion suppressors in the orthogonal direction may be 3 mm or less.

Since the distance between the first diffusion suppressor and the second diffusion suppressor is short, diffusion of body fluid passing between the first diffusion suppressors can be further suppressed.

According to one preferred aspect, the diffusion suppression region may extend continuously in the width direction.

Since the diffusion inhibition region extends continuously in the width direction, it is possible to increase the possibility that body fluid diffusing in the longitudinal direction will be blocked by the diffusion inhibition region.

According to a preferred aspect, the diffusion suppression region may extend continuously along the outer edge of the topsheet in a plan view in the thickness direction.

The spread of body fluids to the outer edge of the surface sheet can be suppressed.

According to one preferred aspect, the diffusion suppressing portion may be formed at least by a compression portion where the surface sheet is compressed in the thickness direction.

Even if the threads in the compression section and its surroundings are temporarily stretched to the processed location due to the force when processing the extension portion for forming the compression section, the threads in the compression section and its surroundings are pulled back from the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated in and around the pressed portion during processing, the concentration of the fibers is alleviated after processing. As a result, the density of the pressed part and its surroundings is lowered compared to the non-woven top sheet, so the difference between the density of the pressed part and its surroundings and the density of the unprocessed part becomes smaller, making it possible to suppress the diffusion of body fluids due to the difference in density. there is.

According to one preferred aspect, the diffusion suppressing portion may be comprised at least of an opening penetrating the top sheet in the thickness direction.

Even if the threads around the opening are temporarily pulled to the machined location due to the force when processing the extension for forming the opening, the threads around the opening are pulled back from the unprocessed portion. Therefore, even if the fibers constituting the yarn are concentrated around the opening during processing, the concentration of the fibers is alleviated after processing. As a result, the density around the opening is lowered compared to the non-woven top sheet, so the difference between the density around the opening and the density of the unprocessed portion becomes small, making it possible to suppress diffusion of body fluids due to the difference in density.

According to a preferred embodiment, the yarn constituting the fabric or the knitted fabric may be composed of non-fused fibers.

Since the yarn is a non-fused fiber, even if heat processing occurred during the production of the absorbent article, the occurrence of high-density fused portions in the top sheet can be suppressed. As a result, diffusion of body fluids due to differences in density can be suppressed.

According to a preferred aspect, the top sheet may be the elastic fabric or knit fabric.

In the case where the diffusion suppressing portion is composed of a pressing portion, the tension and return force of the threads in the pressing portion and its surrounding area from the unprocessed portion becomes greater due to the expansion and contraction of the surface sheet of woven or knitted fabric, so that the yarns in the pressing portion and its surroundings become larger. Concentration of the constituent fibers can be further alleviated. As a result, the difference between the density of the pressed portion and its surroundings and the density of the unprocessed portion can be further reduced, thereby further suppressing the diffusion of body fluids due to the difference in density. Additionally, in the case where the diffusion suppressing portion is comprised of an opening, the tension and return force of the threads around the opening from the unprocessed portion becomes greater due to expansion and contraction of the surface sheet, so that the opening becomes wider. As a result, contact between the fibers constituting the yarn can be further suppressed, and diffusion of body fluids through the fibers can be suppressed.

According to one preferred aspect, the absorbent article may have a backsheet that is in contact with the extension portion and is a liquid-impermeable film. The diffusion suppressing portion may be formed at least by a compression portion where the top sheet and the back sheet are compressed in the thickness direction. In the pressing portion, a part of the backsheet may be inserted between the fibers of the yarn constituting the fabric or the knitted fabric.

Since a part of the backsheet, which is a liquid-impermeable sheet, is contained between the fibers constituting the yarn in the compression portion, the diffusion of body fluid is blocked by the part of the backsheet contained between the fibers, thereby suppressing the diffusion of body fluid.

According to one preferred aspect, the absorbent article may have a backsheet that is in contact with the extension portion and is a liquid-impermeable film. The diffusion suppressing portion may be formed at least by an opening penetrating the top sheet in the thickness direction. A portion of the back sheet may be contained in the opening.

Since a part of the backsheet, which is a liquid-impermeable film, is contained in the opening, the diffusion of body fluid is blocked by the part of the backsheet contained in the opening, thereby suppressing the diffusion of body fluid.

(2) Outline composition of absorbent articles

Hereinafter, with reference to the drawings, and in the description of the drawings below, identical or similar parts are given identical or similar symbols. However, it should be noted that the drawings are schematic and the ratios of each dimension are different from those in reality. Therefore, specific dimensions, etc. must be judged by taking into account the following description. Additionally, parts with different dimensional relationships or ratios may be included between drawings.

1 is a plan view of the absorbent article according to the embodiment as seen from the skin surface side. FIG. 2 is a cross-sectional view taken along line A-A shown in FIG. 1.

The absorbent article 1 has a longitudinal direction (L), a width direction (W), and a thickness direction (T) that are orthogonal to each other. “Skin side” corresponds to the side facing the wearer’s skin during use. The “non-skin surface side” corresponds to the side facing away from the wearer’s skin during use.

The absorbent article 1 has a crotch area (S1), a front area (S2), and a rear area (S3). The crotch area S1 is an area facing the wearer's excretory opening, such as the vaginal opening. When the absorbent article 1 is worn in underwear, the crotch area S1 is an area disposed in the crotch portion of the underwear and between both legs of the wearer.

The anterior region (S2) is located anterior to the crotch region (S1). The posterior region (S3) is located posterior to the crotch region (S1).

The absorbent article (1) has an absorbent body (10), a top sheet (20), a back sheet (30), and a side sheet (40).

The absorber 10 is a member containing absorbent material. The absorbent body 10 is not particularly limited, but may include a hydrophilic fiber layer such as pulp, a superabsorbent polymer (SAP), or a combination thereof.

The top sheet 20 is disposed on the skin surface side of the absorber 10. The top sheet 20 is woven or knitted. The top sheet 20 may be an elastic woven or knitted fabric.

Woven and knitted fabrics are made from threads that are braided by bundling multiple fibers. Fabrics are constructed by weaving threads. For example, the top sheet 20 may be a fabric woven in any of plain weave, twill weave, and satin weave. Knitted fabrics are constructed by knitting yarn. For example, the top sheet 20 may be a knitted fabric made of any of hemp, tricot, plaid, pique, honeycomb mesh, double knit, and pile. The fibers that make up woven fabrics and knitted fabrics are arranged along the yarn length direction. The yarn constituting the woven or knitted fabric may be composed of non-fused fiber. Non-fused fibers include, for example, cotton, rayon, cellulose, and silk.

Additionally, nonwoven fabric is a three-dimensional fiber aggregate in which independently dispersed fibers are formed by adhesive, heat bonding, or mechanical entanglement. The arrangement of the fibers that make up the nonwoven fabric is random.

The top sheet 20 has an extension portion 22 extending outward from the outer edge of the absorber 10. The extension portion 22 has a diffusion suppressing portion 25. The diffusion suppression portion 25 may be formed, for example, by processing in which force is applied in the thickness direction T. The diffusion suppressing portion 25 may have a smaller length in the thickness direction T compared to, for example, an unprocessed portion in which the extension portion 22 is not processed. Therefore, the length of the diffusion suppressing portion 25 of the top sheet 20 (extended portion 22) in the thickness direction T is longer than the length of the unprocessed portion of the top sheet 20 in the thickness direction T. small. Details of the diffusion suppression unit 25 will be described later. The extension portion 22 may have a diffusion suppression region R in which a plurality of diffusion suppression portions 25 arranged at intervals exist.

The backsheet 30 is disposed on the non-skin surface side of the absorber 10. The back sheet 30 is a liquid-impermeable film. The back sheet 30 is in contact with the extension portion 22. Specifically, the portion of the backsheet 30 that extends outward from the outer edge of the absorber 10 is in contact with the extension portion 22.

The side sheet 40 is disposed outside in the width direction W. The side sheet 40 covers the outer edge (outer end in the width direction W) of the top sheet 20. In order to prevent menstrual blood from flowing over the side sheet 40 and out of the absorbent article 1, the side sheet 40 preferably has hydrophobic or water-repellent properties.

(3) diffusion inhibition unit (25)

FIG. 3 is a schematic diagram (cross-sectional view) for explaining the diffusion suppression unit 25. Specifically, it is a cross-sectional view of the diffusion suppression portion 25 in the longitudinal direction (L) and the thickness direction (T). FIG. 4 is a schematic diagram (top view) for explaining the diffusion suppression unit 25. This is a top view of the diffusion suppression portion 25 seen from the skin surface side (thickness direction (T)).

As shown in FIG. 3, in the present embodiment, the diffusion suppressing portion 25 is constituted by a pressing portion 25A in which the top sheet 20 is compressed in the thickness direction T. The pressing portion 25A may be formed by compressing the top sheet 20 in the thickness direction T, for example, by embossing using circular pins. The compression portion 25A (diffusion suppression portion 25) may be circular when viewed from the skin surface side.

Since the surface sheet 20, which is a woven or knitted fabric, is composed of threads, the threads of the pressed portion 25A and the peripheral portion 251 surrounding it and the threads of the unprocessed portion 252 of the other top sheet are continuous. It's connected. For this reason, even if the threads of the compression portion 25A and the peripheral portion 251 are temporarily stretched to the processing location due to the force when processing the extension portion 22 to form the compression portion 25A, the compression portion 25A The threads at 25A and the peripheral portion 251 are pulled back from the unprocessed portion 252. Accordingly, even if the fibers constituting the yarn are concentrated in the pressing portion 25A and the peripheral portion 251 during processing, the concentration of the fibers is alleviated after processing. As a result, the density of the pressed portion 25A and the peripheral portion 251 is lowered compared to the non-woven fabric top sheet. In particular, the density of the peripheral portion 251 does not differ much from the density of the unprocessed portion 252. Since the difference between the density of the pressed portion 25A and the peripheral portion 251 and the density of the unprocessed portion 252 is reduced, diffusion of body fluid (diffusion in the direction of arrow M) due to the difference in density can be suppressed.

Additionally, the density of the pressed portion 25A is greater than that of the unprocessed portion 252. The diffusion speed from the high-density pressed portion 25A to the low-density raw part 252 (diffusion speed in the direction of arrow P) is the diffusion speed in the unprocessed part 252 (diffusion speed in the arrow Q direction). Because it is slower, diffusion of body fluid in the extension portion 22 can be suppressed by the extension portion 22 having the compression portion 25A as the diffusion suppression portion 25.

As shown in FIGS. 1 and 4 , there are a plurality of diffusion suppression portions 25 (first diffusion suppression portions 25A1) arranged at intervals a1 in the diffusion suppression region R. The spacing (a1) is 3 mm or less. Since the diffusion suppression portions 25 are arranged at close intervals a1 in the diffusion suppression region R, at least one of the diffusion suppression portions 25 among the plurality of diffusion suppression portions 25 is located in the diffusion suppression region R. ), the diffusion of body fluids is suppressed. As a result, widespread diffusion of body fluids can be suppressed.

In addition, the plurality of diffusion suppressing units 25 include a plurality of first diffusion suppressing units 25A1 arranged at intervals a1 in the array direction, and second plurality of diffusion suppressing units 25A1 arranged at positions shifted in the orthogonal direction orthogonal to the array direction. It has a diffusion suppressing portion 25A2. From the viewpoint along the orthogonal direction, the second diffusion suppression portion 25A2 is disposed between the plurality of first diffusion suppression portions 25A1. As a result, since the second diffusion suppression portion 25A2 is located in the diffusion direction (i.e., orthogonal direction) of the body fluid that spreads through the first diffusion suppression portion 25A1, diffusion of the body fluid is suppressed.

The distance a2 in the orthogonal direction between the first diffusion suppression portion 25A1 and the second diffusion suppression portion 25A2 may be less than 3 mm. As a result, since the distance a2 between the first diffusion suppressing portion 25A1 and the second diffusion suppressing portion 25A2 is short, diffusion of body fluid passing between the first diffusion suppressing portion 25A1 can be further suppressed. You can.

The diffusion suppression region R may be continuously extended in the width direction W. As a result, it is possible to increase the possibility that body fluid diffusing in the longitudinal direction L will be blocked by the diffusion suppression unit 25.

The diffusion suppression region R may extend continuously along the outer edge of the topsheet 20 in plan view. It is possible to suppress the spread of body fluids to the outer edge of the surface sheet 20.

The diffusion suppression portion 25 may be formed at least by a compression portion 25A where the top sheet 20 and the back sheet 30 are compressed in the thickness direction T. In that case, in the pressing portion 25A, a portion of the backsheet 30 may be inserted between the fibers of the yarn constituting the woven or knitted fabric. For example, by embossing the top sheet 20 and the back sheet 30 together, a portion of the back sheet 30 is melted, thereby forming the back sheet 30 between the yarn fibers of the top sheet 20. It's okay if some of it is included. As a result, the diffusion of body fluid is blocked by the part of the backsheet 30 sandwiched between the fibers, and the diffusion of body fluid is suppressed.

On the other hand, when the yarn constituting the top sheet 20 is a non-fused fiber, the occurrence of high-density fused portions in the top sheet 20 can be suppressed even if heat processing occurred during the manufacture of the absorbent article. . As a result, diffusion of body fluids due to differences in density can be suppressed.

In addition, when the surface sheet 20 is an elastic woven or knitted fabric, the yarns of the pressed portion 25A and the peripheral portion 251 are separated from the unprocessed portion 252 by stretching and contracting the woven or knitted surface sheet 20. Since the tensile return force becomes larger, concentration of the fibers constituting the yarn in the compression portion 25A and the peripheral portion 251 can be further alleviated. As a result, the difference between the densities of the pressed portion 25A and the peripheral portion 251 and the density of the unprocessed portion 252 can be further reduced, thereby further suppressing the diffusion of body fluid due to the difference in density.

(4) Second embodiment

The absorbent article 1 according to the second embodiment will be described. Fig. 5 is a schematic diagram of the diffusion suppressing portion 25 for explaining the absorbent article 1 according to the second embodiment.

The diffusion suppression portion 25 is comprised at least of an opening 25B that penetrates the topsheet 20 in the thickness direction T. The opening 25B may be formed by compressing the top sheet 20 in the thickness direction T, for example, by embossing. The opening 25B may be formed, for example, by processing with a cutter or other blade.

Since the top sheet 20, which is a woven or knitted fabric, is composed of threads, the threads in the peripheral portion 251 around the opening 25B and the threads in the unprocessed portion 252 of the other top sheet are continuously connected. . For this reason, even if the threads of the peripheral portion 251 are temporarily stretched at the processed location due to the force when processing the extension portion 22 for forming the opening portion 25B, the threads of the peripheral portion 251 will remain in the unprocessed portion. Tension returns from (252). Accordingly, even if the fibers constituting the yarn are concentrated in the peripheral portion 251 during processing, the concentration of the fibers is alleviated after processing. The density of the peripheral portion 251 is not much different from the density of the unprocessed portion 252. As a result, since the density of the peripheral portion 251 is lowered compared to the non-woven fabric top sheet, the difference between the density of the peripheral portion 251 and the density of the unprocessed portion 252 becomes small, thereby suppressing the diffusion of body fluids due to the difference in density. You can.

Additionally, the fibers of the yarn constituting the woven or knitted fabric are cut by processing the extension portion 22 to form the opening portion 25B. As a result, diffusion of body fluids (diffusion in the direction of arrow S) through the yarn fibers can be suppressed. For this reason, diffusion of body fluid in the extension portion 22 can be suppressed.

A part of the back sheet 30 may be inserted into the opening 25B. For example, when forming the opening 25B in the top sheet 20 and the back sheet 30 together, a part of the back sheet 30 is broken, thereby leaving a part of the back sheet 30 in the opening 25B. You may go in. As a result, the diffusion of body fluid is blocked by the part of the backsheet 30 that is in the opening 25B, thereby suppressing the diffusion of body fluid.

In addition, when the surface sheet 20 is a fabric or knitted fabric with elasticity, the stretching of the surface sheet 20 increases the force for the threads in the peripheral portion 251 to be pulled back from the unprocessed portion 252, so that the opening (25B) becomes wider. As a result, contact between the fibers constituting the yarn can be further suppressed, and diffusion of body fluids through the fibers can be suppressed.

(5) Other embodiments

In each of the above-described embodiments, the pressing portion 25A and the opening portion 25B are circular in plan view, but are not limited to this. For example, the pressing portion 25A and the opening portion 25B may have a slit shape extending in a predetermined direction in plan view. The predetermined direction may be, for example, the width direction (W). As a result, it is possible to increase the possibility that body fluid diffusing in the longitudinal direction L will be blocked by the diffusion suppression unit 25.

In each of the above-described embodiments, the spacing a1 may be 0.5 mm or more. Additionally, the distance a2 may be 0.5 mm or more. As a result, an area capable of absorbing body fluid can be secured in the area between the diffusion suppressing portions 25, and thus leakage of body fluid can be suppressed.

Although the absorbent article of this embodiment has been described by taking a sanitary napkin as an example, it is not limited to this. The present invention may be applied to other absorbent articles (e.g., panty liners, breast milk pads, urinary incontinence pads for adults, fecal pads, or sweat absorbent sheets, etc.). The present invention, especially absorbent articles, may be applied to articles used by being attached to the inside of a wearing article such as a user's underwear.

Although the present invention has been described in detail using the above-described embodiments, it is clear to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented in modifications and variations without departing from the spirit and scope of the invention as defined by the claims. Accordingly, the description in this specification is for the purpose of illustrative description and does not have any limiting meaning with respect to the present invention.

(6) Comparative evaluation

Comparative evaluation of diffusion inhibition in body fluids is described. Specifically, first, in each Example and each Comparative Example, the top sheet and the back sheet were compressed in the thickness direction (T) to form a pressed portion (embossed portion). Acupuncture points were instilled at a location 20 mm away from the boundary between the embossed portion and the non-embossed portion in the longitudinal direction (L). Specifically, the cycle of dropping 1 ml of acupuncture point over 5 seconds and leaving it on for 5 seconds was repeated four times. After 30 minutes, the length of diffusion of the acupuncture point in the longitudinal direction (diffusion length) was measured.

In Examples 1 and 2, the top sheet was fabricated and had a weight per unit area of 100 gsm. In Example 1, a pressing portion and a plurality of opening portions are formed as diffusion suppressing portions. In Example 2, a pressing portion was formed as a diffusion suppressing portion.

In Examples 3 and 4, the top sheet was made of tricot and had a weight per unit area of 100 gsm. In Example 3, a pressing portion and a plurality of opening portions are formed as diffusion suppressing portions. In Example 4, a pressing portion was formed as a diffusion suppressing portion.

In Comparative Examples 1 and 2, the surface sheet was non-woven (Cotton SL) and had a weight per unit area of 105 gsm. In Comparative Example 1, a pressing portion and a plurality of opening portions are formed as diffusion suppressing portions. In Comparative Example 2, a compression portion was formed as a diffusion suppression portion.

In Comparative Examples 3 and 4, the top sheet was a nonwoven fabric (MVF30) and had a weight per unit area of 90 gsm. In Comparative Example 3, a pressing portion and a plurality of opening portions are formed as diffusion suppressing portions. In Comparative Example 4, a pressing portion was formed as a diffusion suppressing portion.

In each Example and each Comparative Example, the weight per unit area of the absorber was 300 gsm. The weight per unit area of the back sheet is 23.5 gsm.

As shown in Table 1, it can be seen that the absorbent article according to Example 1-4 has a shorter diffusion length than the absorbent article according to Comparative Example 1-4. In Comparative Example 1-4, the acupuncture points spread even when they reached the diffusion inhibition zone, whereas in Example 1-4, the diffusion of the acupuncture points that reached the diffusion inhibition zone was suppressed.

In addition, the diffusion length was measured under the same conditions using the surface sheet as a fabric, and it was confirmed that diffusion of body fluids could be suppressed, similar to Example 1-4.

As described above, it can be seen that the absorbent article according to the present invention can suppress the diffusion of body fluids.

Although the present invention has been described in detail using the above-described embodiments, it is clear to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented in modified and altered forms without departing from the spirit and scope of the present invention defined by the claims. Accordingly, the description in this specification is for the purpose of illustrative description and does not have any limiting meaning with respect to the present invention.

According to the above aspect, it is possible to provide an absorbent article capable of suppressing diffusion of body fluid in the extended portion of the surface sheet extending outward from the outer edge of the absorbent body.

1: Absorbent article
10: absorber
20: surface sheet
22: extension part
25A: Compression part
25A1: first diffusion suppressor
25A2: second diffusion suppressor
25B: opening
251: Periphery
252: Raw material
30: back sheet
40: side seat
L: longitudinal direction
W: Width direction
T: Thickness direction
S1: Crotch area
S2: anterior region
S3: posterior region

Claims (13)

Length direction, width direction and thickness direction orthogonal to each other,
An absorber,
Surface sheet disposed on the skin surface side rather than the absorber
As an absorbent article having,
The surface sheet has an extension portion extending outward from the outer edge of the absorber,
The extension portion has a diffusion inhibition portion,
The surface sheet is made of yarn and is a woven or knitted fabric with elasticity,
The diffusion suppressing portion is comprised at least of an opening penetrating the surface sheet in the thickness direction,
An absorbent article in which, in the diffusion suppressing portion, the fibers of the yarn constituting the woven or knitted fabric are cut by processing the extension portion to form the opening. Length direction, width direction and thickness direction orthogonal to each other,
An absorber,
Surface sheet disposed on the skin surface side rather than the absorber
As an absorbent article having,
The surface sheet has an extension portion extending outward from the outer edge of the absorber,
The extension portion has a diffusion inhibition portion,
The surface sheet is made of yarn and is woven or knitted,
The diffusion suppressing portion is formed at least by a compression portion where the surface sheet is compressed in the thickness direction,
In the diffusion suppression portion, some of the fibers of the yarn constituting the fabric or knitted fabric are cut by processing the extension portion to form the compression portion,
An absorbent article, wherein the threads of the compression portion and its surrounding periphery of the diffusion suppressing portion of the extension portion and the threads of the unprocessed portion of the other surface sheet are continuously connected. The method according to claim 1 or 2, wherein the extension portion has a diffusion inhibition region in which a plurality of diffusion inhibition portions are disposed at intervals,
An absorbent article wherein the gap is 3 mm or less. The method according to claim 3, wherein the plurality of diffusion suppressors include a plurality of first diffusion suppressors arranged at intervals in an array direction, and second diffusion suppressors disposed at positions offset in an orthogonal direction perpendicular to the array direction. ,
An absorbent article in which, when viewed from a perspective along the orthogonal direction, the second diffusion suppressing portion is disposed between the plurality of first diffusion suppressing portions. The absorbent article according to claim 4, wherein the distance between the plurality of first diffusion suppressing portions and the second diffusion suppressing portion in the orthogonal direction is 3 mm or less. The absorbent article according to claim 3, wherein the diffusion inhibition region extends continuously in the width direction. The absorbent article according to claim 3, wherein the diffusion inhibition region extends continuously along an outer edge of the top sheet in a plan view in the thickness direction. delete delete The absorbent article according to claim 1 or 2, wherein the yarn constituting the fabric or the knitted fabric is made of non-fused fiber. The absorbent article according to claim 2, wherein the surface sheet is the fabric or the knit fabric having elasticity. The absorbent article according to claim 1 or 2, wherein the absorbent article is in contact with the extension portion and has a back sheet that is a liquid-impermeable film,
The diffusion suppressing portion is formed at least by a compression portion where the top sheet and the back sheet are compressed in the thickness direction,
An absorbent article in which a part of the backsheet is sandwiched between fibers of yarns constituting the fabric or knitted fabric in the pressing portion. The absorbent article according to claim 1 or 2, wherein the absorbent article is in contact with the extension portion and has a back sheet that is a liquid-impermeable film,
The diffusion suppressing portion is comprised at least of an opening penetrating the surface sheet in the thickness direction,
An absorbent article in which a portion of the backsheet is contained in the opening.